Trimming machine



I Sept 25,1923. mfimw.

E. ERICKSON TRIMMING MACHINE Filed June 21 i919 Patented Sept. 25, 1923.v

UNITED STATES titans PATENT orrics.

EDWARD ERICK SON, OF BEVERLY, MASSACHUSETTSJASSIGNOB TO UNI'fED SHOE MA-CHINERY CORPORATION, OF PATERSON, NEW JERSEY, A CORPORATION OF NEWJERSEY.

ranvnvrrive MACHINE.

Application filed June 21, 1919. Serial No. 305,731.

To all whom it may concern:

Be it known that I, EDWAR ERICKSQN, a citizen of the United States,residing at Beverly, in the county of Essex and tate of Massachusetts,have invented certain-Improvements in Trimming Machines, of which thefollowing description, in connection with the accompanying drawings, isa specification, like reference characterson the drawings indicatinglike parts in the several figures. 3

This invention relates to trimming machines and more especially to thoseadapted to operate on bootsan'd shoes. p

In the manufactureof boots and shoes that would beseriously damagedbybeing soiled or discolored, the uppers are, in some cases, covered byprotectors made of some relatively thin sheet material such as cloth orpaper. NVhen such protecting covers are a used they are applied to theuppers before the shoes undergo lasting and remain on the shoes untilthe latter are otherwise completed and ready to be packed. Incidentallyto attaching the margin of the upper to the sole the protecting cover iscaught by the stitches or other fasteners, so that considerabledifficulty ensuesin connection with the removal of the" cover.Heretofore it has been the practice to remove thevisible part of-thecover first slashing the latter from top to bottom at the toe and heel,turning down the sections divided by slashing, and finally by drawing ascoring knife manually along that portion of the cover that lies on thesole-extension. This manual scoring operation is not entirelysatisfactory, partly because the scoring knife sometimes injures theshoe, partly because it is difiicult ifnot impossible to trim the. coverclosely enough to the creaseformed by the upper andithesole-extensiomand partly because it requires considerable time and skillon the part of the operatives. So far as lam aware no machine forperforming this operationhas ever beensuccessful although some attemptshave been madetofprovide a satisfactory machine for thefpu'rpose. 7 v

In viewof the aforesaid problem and dif ficulties the principal objectof the present invention is to provide a satisfactory ma chine forscoring or severing a shoe cover.

In accordance with this object a feature o t e v n i n ons ts in a sh nehev' motion;

ing a scoring knife constructed, arranged and operated so as to score orsever a shoe cover in the crease formed by the upper and thesole-extension, without liability of inuring the shoe or of leaving anyremnant of the cover pro ectmg from the crease far enough to beobserved.

i to engage the work intermittently and preferably by striking a seriesof percussional impacts to penetrate the work without appreciablyvibrating the latter. The invention also preferably includes a guardagainst which the shoe may be held and relatively to which it may be fedby the hands-of the operative. The guard, moreover, as shown, isarranged tooverhang the knife and to lie between the knife and theshoe-upper so as to bear on the latter. The tip of the guard bears onthat part of the shoe-cover that lies on the upper surface of the soleso as to limit the penetration of the knife.

Another feature of the invention consists in novel means for impartingoperating motion to the knife. According to the form illustrated theknife is moved to penetrate the work and is otherwise moved, whilepencrating, to execute a drawing cut, the operating edge thereforehaving a compound The scoring or cutting edge of the knife, according tothis embodiment of the invention, is caused to describe an endlesscurved path through the greater portion of which it-is clear of the workand behind the guard. Because of the thinness of shoecovers the knife ispreferably so operated, and the knife and guard are preferably sorelated, that the extent of drawing cut in each cycle will beconsiderably greater than the depth of penetration. Accordingly, theinvention, as shown, is embodied in a machine that fulfills theseconditions. Tlhe construction of the operating parts .is such that theymay operate at very high speed, and although the knife does not engagethe work continuously the latter may be fed continuouslyia nd rapidlywithout interrupting the continuityof the scoring out, and

without departing from the crease even wherethe latter curves sharplyas-at the endsan'd at the ball portion of the shoe.

Since, in trimming along the sharply curved portions. ample clearancebetween the knife and the work is desirable, and since V nism thatwill'insure the desired margin of clearance with a minimum degree ofvibra' tion. Accordingly, these considerations are taken into account inthe illustrated form of the inventionin which the knife is caused toexecute an elliptic motion of which the ma jor component includespenetration and learance while the minor component causes the drawingcut. Moreover, as shown, the operating mechanism causes the drawingaction to be effective so long'as the knife is in contact with the work,and consequently it becomes effective simultaneously with the beginningof each penetration. 7

These and other features of the invention are illustrated by theaccompanying" drawings and are hereinafter described in detail andclaimed.

Referring to the drawings,

Fig. 1 represents a side elevation, partly broken away, of a machineembodying the present invention, the upper portion of the head beingshown in vertical section;

, Fig. 2 represents a cross-section through the structure intersected byline 2--2 of Fig. 1; .7

Fig, 3' represents a sectional view similar to Fig. 1 but on a largerscale of the scoring knife and the elements adjacent thereto, andincludes a portion of a shoe in position to undergo operation;

Fig. 4 represents a section throughthestructure intersected by. line Hof Fig. 3; and

" Fig. 5 represents a section through the structure intersected by line55 of Fig. 3.

7 Fig. 6 represents an elevation of the workengaging portions of theknife and knifeguard.

The machine as shown comprises a base .orstandard 10 and a frame or head12 affixed thereto. The scoring knife is indicated at l gand it is shownin the present instance as embodying an arcuate form for purposeshereinafter explained.- One end of the knife is beveled to form thescoring or severing edge. The knife. is detaohably and adjustablyfastened to a holder or earrierwlti whiehin the present instance has ashank portion 1 8 that constitutes a rockshaft. The

portion indicated at 16. has an internal cylindric groove '20 ofthe samedegree of curva-r.

ture'as the knife and the latter is seated there in and clamped by abolt 22and a clamp ngbar 2 1:. The holder 16 is bored and tapped toreceive the shank "ofthebolt and the shank extends loosely through ahole in the bar 24f Thisbar bridges across the concavity of the'lmife.holder and one end is seated upon the knife while the other end 7 isseated in the groove 20 so as to be locked againstvrotation about theaxis of, the bolt.

Whenthe bolt is loosened the knife maybe adjusted lengthwise or may heremoved for sharpening or replacement.

The shaft portion '18 of the knife-holder extendsthrough a sleeve26 andis retained in the sleeve by the: hub 28 of an arm 30.

through the medium ofa block 36. The

pin 34 as shown is screwed intothe frame of the head 12 and the block 36is mounted thereonso as to be free to swivel. The

arm 30, as shown by Fig. 2, is forked and is arranged to embrace theblock.

The bore of the sleeve 26 is eccentric and the sleeve is rotated aboutits axis so as to carry thevrock-shaft bodily about said axis. Anysuitable means may be provided for rotating the sleeve, the means showncomprising apullev 38 affixed to the upper end of the sleeve, and a belt40 running from said pulley to a driving pulley 42. For the convenienceof the oper'ative'the sleeve 26 and rock-shaft 18. are inclined, andsince 7 the shaft let-that carries the driving pulley 42 is horizontalidle pulleys such as that indicated attG are arranged to guide the belt.

'The sleeve 26 bears in a hardened steel bushing 48 and the latter isfixed by any suitable means ina bore in the head. End shake'of thesleeve' is prevented by a shoulder50 at the lower end and by the hub ofthe pulley at'the' upper end. The head is provided with an oil cup 52from which oil is, conducted to the sleeve by a v duct 54L that extendsthrough the bushing.

As the sleeve is rotated it carries the rockshaft 18 bodily; in acircular'path the diameter'of which dependsupon the degree ofeccentricity between the axis of "the sleeve and that of the rock shaftIThe bodily mately midwaybetween the f the eas es there'sult that thelateral movement ofth'e f knife is only one-half as great as themovement toward and from the plane of'the work.

Figure 3 includes a portion of a shoe to which aprotecting cover hasbeen attached.

Theupper of the shoe is indicated at 56 and the sole-extensionfisindicated atj58, The

protecting cover isindicated at 60 and it is shown as having been turneddown from Ethe vupper preparatory tobeingsevcred; It is to benoted thatthe inner marginal portion-of the-coveris held by the stitches thatconnect the sole to the upper, one of said stitches being indicatedtat-62. In practice 7 the 'shoe is presented to the knife in suchrelation that the scoring edge of the knife will operate. in the creaseformed by the upper and the sole-extension, but in order to guidethework relatively to the knife and to guard the workagainst; injury themachine is-pro vided with a guard 64. This guard as shown 18 affixedtothe head-12 by: screws one of which isindicated at 66. The tip :oftheguard is beveled to a thin edge and is arranged to bear'onthat portionof the cover 60 that lies on the sole-extension. The guard also bears onthe upper adjacent to the sole-extension and when the shoeisjundergoingoperation the guard lies between the knife and theshoe-upper. The knife will preferably be adjusted relative toits holderso that its scoring edge willnever project beyond the tip of the guardmore than enough to cut through the cover 60, and consequently the knifewill be fully out of greater portion of its cycle.

r In, order to enable the knife to trim in the icrease'along the incurveofthe shank portion of the shoe the outer surface of the guarc ispreferably convexed to a degree commensurate with thegreatest degree ofconcavity to be, encountered in the shank portions of shoes. The shoemay be tipped so' as to have the plane of the sole, more nearlyvertical, when necessary, to enable the knife to enterthe lessaccessible portions of the-crease. A very light pressure of thesole-extension against the tip of the guard is suflicient to insurepenetration of the cover f working loose. tural feature permits theupper part of the by the knife because the latter will operate at veryhigh speed and will penetrate by impact before itcan'overcomethe inertiaof-the shoe.

The arcuate form of the knife, as shown,

is preferable because it permits the clamping 7. bolt 22 and bar 24 tobe located outof the "way ofthe guard and to be of ample proportions tohold the knife without dange Furthermore, this strucguard to divergeaway from the shoe without'obstructing the bodily movement of the head16 of'the knife-holder.

movement claim as new and desire to secure by LettersPatent of theUnited States is 7 1. A machine of the character described comprising ascoring knife arranged to score the work in the crease formed by theupper and the sole-extension of a shoe, and means arranged to operatethe knife so as to cut repeatedly through the cover material lyon thesole-extension. 2. A machine of the character described comprising abodily movable knife arranged to score the work in the crease formed bythe upper and the sole-extension of a shoe, and. meansarranged tooperate the knife so asto engage the work intermittently.

21A machine of the character described comprising a-bodily movable knifearranged to score the work in the crease formed by the upper and thesole-extension of a shoe, and means arranged to operate the knife so asto cause the scoring edge to describe an endless path tangential to theupper surface of the sole-extension. 7

l. VA machine of the character described comprising a scoring knifearranged to score the work in the crease formed by the upper and thesole-extension of a shoe, and means arranged to operate the knife so asto cause the scoring edge to engage the work intermittently and todescribe an endless path tangential to the sole-extension.

5. A machine ofthe character described comprising a scoring knife, meansarranged to coact with the sole-extension of a shoe to guide the latterrelatively to the knife, and'means arranged to operate the knife so asto cause a relatively slight penetrating movement and a relatively longdrawing cut.

6. A machine of the character described comprising a bodily movablescoring knife, means arranged to guide a piece of work relativelythereto, and means for causing the knife to operate on the workintermittently by executing relatively slight penetration and arelatively long drawing out for each cycle.

7,,A machine of the character described comprising a knife having acutting edge arranged to operate in the crease formed by the upper andthe sole-extension of a shoe, a guard arranged to coact with thesole-extension to locatethe latter relatively to said knife, and meansfor operating the knife so as to cause a relatively slight penetratingand a relatively long drawing out. 8. A machine of the characterdescribed comprising a scoring knife, means for guid- 'ing the workrelatively thereto, and means for operating the knife so astocause it tope netrate the ivork intermittently and to execute a drawing out whilepenetrating.

9. A machine of the character described comprising a knife having ascoring edge,

means for guiding the Work relatively thereto, and amea ns for operatingthe knife so as to impart penetrative and other operating 7 movementthereto; V r lOQA machine ofthe character described comprising a scoringknife arranged to score the work in the crease'formed by the upperandthe sole-extension of a shoe, and means arranged to operate the knifeso as-to causethe scoring edge to describe an elliptic path tangentialto the sole extension.

lli A machine of the character described,

comprising a scoring knife arrangedto score the work in the creaseformed by the upper and the sole-extension, a guard arranged to bear onthe upper and on the work to be severed, and means arranged tothrustithe knife repeatedly through the Work lying on thesole-extension.

"12. A machine of the character described comprising a scoring knifearranged to score the Workin the crease formed by the upper and thesole-extension, means arranged to operate the knife, and a guardarranged to limit the penetration of the knife.

13. Amachine of the character described comprising a scoring knifearranged to score the Work in the crease formed by the vupperv and thesole-extension, means arranged to thrust theknife repeatedly toward 7the sole-extension, and a guard arrangedito bear on the upper and on the\vorlclying on the sole-extension so as to locate the latter relativelyto the knife. 7

14. A machine of the character described 'comprising'a scoring knifearranged to of the knife to thercreasein the incurved shank portion ofthe shoe. 7

I 15. A machine of the character-described comprising a, rock-shaft, ascoring knife carried thereby, and means arranged to oscillate therock-shaft and tomove 1t bochly so as to impart acompound motion to. theknife. V

' 16. A machine of the character described comprising a rockshaft, ascoring knife carried thereby, and means arranged tooscillate therockshaft about its axis and'to move it bodily about another axis so asto impart a compoundmotion to the knife.

'17. A machine of the character described 7 comprising a rockshaft, ascoring knife carriedthereby, means arrangedto carry the rockshaftbodily about an axis other than its own and to move it synchronouslyabout its own axis so as to impart a compound motion to the knife.

18. A machine of the character, described comprising a rotary drivenmember having an'eccentric bore, a tool-holder carried by.

rotary member. 7 19. A machine of the character described" saidmemberand 'having shaft portion ar ranged in said. bore, a tool carriedby said tool-holder, and 1 means arranged to hold 7 said tooth-olderagainst turning with said comprising a rotary driven member having aneccentric bore, a rockshaftcar'ried. by

said member and arrangediin said bore, a

tool carried by said rockshaft, an element relatively to which saidmember is movable, "and means connecting sald element and said rockshaftso as to 1 cause oscillatory motion of the latter in consequence "ofrotation of said driven member;

'20. A machine of t'hecharacter described i comprising a rotary sleeveand a bearing structure therefor, the'bore of sand sleeve beingeccentric, 1 a rockshaft extending through and bearing in sa d boreya'tool' carried by'said rock'shaft, means for rotating 1 the sleeve, andmeans arranged to oscillate the rockshaft in consequence. ofthebodilymovement imparted to the latter by rotation 7 of the sleeve;

21. A machine-- of the character described comprising arbodily movableknife arranged to operate inthe crease formedby the upper and thesole-extension" of a shoe, a-fixed guard arranged to bear on thematerialto be severed from the shoe, and'ineans for operating said knifeso as to project the operating edge beyond and to retract it behind saidguard; r

; "22; A machine 'of the character described comprising a bodily movableknife arranged V and the sole-extensionof a. shoe, fixed means arrangedto co-operate Wlthlthe sole-extension to locate the materialto-be'operated on byrthe knife, and means for operatingfthe knife so asto cause the operatingjedge 'to' operate in the crease formed by theupper thereof to strike a series of percussional fim pacts 21 means andthe sole-extension;

23. -A machine of the character comprising a movable bladeeholder, an

gainst the material between said fixed edge at one end arranged tooperate in the crease formed by the upper :and the soleextension of ashoe,fsaid holder=having aconcave surfaceagainst which the" convexsurface of the blade is seated, means co-actmg w th the concave surfaceof the blade to V clamp the latter to the holder, andmeans' foractuating the blade-holderto operate the blade.

24. A machine of the character described comprising a movablebladediolder, an arcuate knife-blade having operating edge at oneendarranged to operate in the extension of a shoe, means forfasteningthe blade to the holder in such relation that the shank portion of theblade curves awaydescribed arcuate knife-blade having an operating"crease formed by the upper and" the stile v r from the shoe-upper andmeans for actuating the blade-holder to operate the blade.

25. A machine of the character described comprising an arcuateknife-blade arranged to overhang the sole-extension of a shoe and havingan operating edge at one end arranged to operate in the crease formed bythe upper and sole-extension, a curved guard formed and arranged tooverhang the knife and to bear against the shoe-upper adjacent to saidcrease, and means for operating the knife, the machine being organizedto provide an unobstructed space in which the shoe may be manipulated soas to keep the point of operation in said crease.

26. A machine of the character described comprising a blade-holderhaving an internal semi-cylindric groove, an arcuate blade arranged insaid groove and having an operating edge at one end, a clamping memberportions of which are arranged to bear respectively on the concavesurface of the blade and on the semi-cylindric surface of said groovebehind the rear end of the blade, means arranged to cause said member toclamp the blade to the holder, and means for actuating the holder tooperate the blade.

In testimony whereof I have signed my name to this specification.

EDWARD ERICKSON.

